<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="content-type" content="text/html; charset=UTF-8">
        <meta charset="UTF-8">
        <style type="text/css">
            body {
                margin: 0;
            }
            div {
                background-color: red;
                width: 100px;
                height: 100px;
                position: absolute;
                right: 0;
            }
        </style>
    </head>
    <body>
        <div></div>
    </body>
</html>
